Method of determining movements.



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METHOD OF DETERMINING MOVEMENTS.

APPLICATION FILED FEB. H, ISIS.

D/V4 km 000 METHOD OF DEIERMINWG MOVEMENTS APPLICATlON HLED FEB.1|,l9I6

W. Juan V i A HIE mew 10D, and

g ad hranm'erse sect? ilk. 0113.11

Serial No. 1111 on .11. Hy on i310 1s :1 PGISPQGJIYQ new of a. testin .l .1 1.1.. .7. -L 1 J S 2.0152 if m (411 0072mm Be it known tl'mii I. WALTER C. Uniied States. and 1'? 1 me county.

To all 20,

"itizen of the ate of un no ethods 1, also in Fig.

Similar to Hm useful 1'11 of Dotm'min Detmit. Y 5 hu'vmg' mveniied ce.

movements m such.

minin a Y I 1 Au d... 8 1mm. .4... 1

is in ent" jeu provide means for the hi f the 0b 'ive z-novm One 0 front and rear 7 9 Wfil lenders uonmriso the rmmin While.

'imce. mother obgect is to provi eciive method and a vehicle, ospociafly irregular $111 A eff 0 mini RIEQ A N the T6811 the bod have conveyance, whose 11 2U1C87 such as tel-111i led, W nun-ks, such as a'n Glee/tricin the vehicle within Barge of a camera hzzvi: tlonzuy sensitized during the mover thus producn' YAJOUS parts 1 in bme the an a p .1 for '0 produce a p the be securd.

mp a of the a spasms 1t -1g11re 1 lllustmtes, more or I nut-wally, a comple gmmupper part 2 p msnnbw may be formed p cqny in which may be. ixreaded the a in c 35. the front end of which to be Roach wrung less Ci set 11 pripi eqmpped wlth (ii camera mounte hide; Elg. 2 1s an enlarged new of a 1.

1 5 1Q L... m 3 0 n? 1 \J e a sideleva'tifin or otherwise secured to the arm, neck or head of passengers in the front and rear seats, respectively, or if desired, these lamps may be mounted on weights, not shown, on the seats.

It will be noted that all of the lamps are arranged in different horizontal planes and it will be understood that to further distinguish between the lamps while they are moving, I prefer to have the three rearmost lamps of greater intensity, or of (lifferent light quality, than the other.

A camera 44, which is provided with the usual sensitized film or plate image recorder, may be set up at a proper distance from the piece of road or pavement, on which it is desired to test the movements or riding qualities of the vehicle. The plane of the sensitized recorder will be substantially vertical and parallel with the proposed direction of movement of the vehicle.

The camera having been correctly focused, if the testis to be made at night, the distinguishing lamps on the vehicle will be illuminated and the car driven across in front of the camera within its photographic range, while .the plate is intermittently, or preferably continuously, exposed, with the result that the developed recorder will re produce light lines or spots showing the path of travel of the part on which the less intense lamp 15 mounted, and heavier lines showing the path of themore intense lamps. Characteristic curves, which will be produced on an image recorder by a night test with the above described equipment, are illustrated in Fig. 6. To obtain exact comparisons, the vehicle should always travel over the same ground, with the camera set up in the same location and alinement. My methods and apparatus may be also used to obtain. records of the actual profile of the testing road, by driving the car very slowly, say one mile per hour, to eliminate tire depression, or by moving a portable'light over the surface of road within the photographic range of the camera while the recorder is exposed, thus producing a line or road contour curve, as above described. The road profile'curve may be recorded upon the same sensitized surface as the records of the other curves are laced, by making a separate exposure of tne camera.

Most, if not all, instruments previously devised for recording riding qualities have had the inherent fault that their moving parts have natural periods of vib ation. The amplitude of movement of these parts becomes proportionately great when the road shocks occur in intervals of time which synchronizewith the natural periods of vibration of'these parts; therefore, a series of small shocks in synchronism with these periods of vibration may give a record of great amplitude and entirely out of proportion with the vertical shock received by car.

I believe that mine is the first device ever invented which, will record simultaneously, and with absolute accuracy the path of travel of all the critical points of an automobile or other conveyance. The complete action of tires, chassis springs, and cushion springs can at once be determined. The periods of vibration of passengers on cushion springs, of front and rear ends of car on chassis springs, and of wheels upon tires, can be accurately and positively determined, since the scale (inches to feet) of therecord, and the speed of travel are both known, when each record is made. Heretofore it has been necessary to depend upon the mental impression received by passengers in automobiles. These impressions are modified by the mental and physical condition of the passenger at the time he rides, and it is a well known "fact to automobile engineers that the impression produced simultaneously upon two passengers in the same automobile are often at wide variance.

My method of obtaining actual records eliminates this variation and permits of complete permanent records being kept for as many combinations of load, tires, chassis springs, shock absorbers, auxiliary springs, cushion springs, spring wheels, rebound checks, etc., as may be desired.

While I have provided self contained battery lamps for the various marks, these may be connected to a common source of current by flexible wires, or, if it is desired to make the tests in day light, other suitable distinguishing marks may be used, for obtaining similar, though perha 78 not as clearly defined results. And, although I have shown my invention as applied to the determination of road contours and conveyance movements, it will be understood, that it may be applied to various other uses; and various modifications of my methods and equipment may be made, without departing from the spirit and scope hereof.

Having thus described my invention, what I claim and desire to secure by Letters Patent is f s 1. In a movement determining apparatus,-

the combination with a vehicle running gear, a resiliently mounted body thereon, of distinguishing mark arranged on said running gear, another distinguishing mark resiliently arranged on said body, a camera having a sensitized image recorder, and means for continuously exposing said recorder during a movement of said vehicle \vithinthe photographic range of the camera.

2. In a movement testing apparatus, the combination of a vehicle running gear, distinguishing marks arranged in different planes thereon, a resiliently mounted body on the running gear having distinguishing marks in planes difi'ei'ent from said other marks. a camera having a stationary sensitizel image recorder, and means for continueusly exposing said rec ClGl during a movement of said vehicle Wimin the photographic range of the camera 3. In a movement testing apparatus, the combination of a vehicle running gear, detachable distinguishing marks arranged in different planes tliereen, a resiliently indented body on 52ml running gear, proiiiecl Wi'li a. plurality 0f detachable distinguisliing Inna-ks arranged in planes (lififereniz from seiei other marks, zi'eameizi having stationery sensitized intmge record 1, and means for continuously exgosing said reeoi'der during inc. iiient 01" said vehicle Within the photographic range of said. 681211811 In testimony wliei'eef i nfiix my signature.

@WALTER C. KEYS. 

